[Extensions] Handle some funny cases in script injection

extensions/renderer/scripts_run_info.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EXTENSIONS_RENDERER_SCRIPTS_RUN_INFO_H_
 #define EXTENSIONS_RENDERER_SCRIPTS_RUN_INFO_H_
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/macros.h"
 #include "base/timer/elapsed_timer.h"
 #include "extensions/common/user_script.h"
 
-namespace blink {
-class WebLocalFrame;
+namespace content {
+class RenderFrame;
 }
 
 namespace extensions {
 
 // A struct containing information about a script run.
 struct ScriptsRunInfo {
   // Map of extensions IDs to the executing script paths.
   typedef std::map<std::string, std::set<std::string> > ExecutingScriptsMap;
 
-  ScriptsRunInfo();
+  ScriptsRunInfo(content::RenderFrame* render_frame,
+                 UserScript::RunLocation location);
   ~ScriptsRunInfo();
 
   // The number of CSS scripts injected.
   size_t num_css;
   // The number of JS scripts injected.
   size_t num_js;
   // The number of blocked JS scripts injected.
   size_t num_blocking_js;
   // A map of extension ids to executing script paths.
   ExecutingScriptsMap executing_scripts;
   // The elapsed time since the ScriptsRunInfo was constructed.
   base::ElapsedTimer timer;
 
   // Log information about a given script run.
-  void LogRun(blink::WebLocalFrame* frame, UserScript::RunLocation location);
+  void LogRun();
 
  private:
+  // The routinig id to use to notify the browser of any injections. Since the
+  // frame may be deleted in injection, we don't hold on to a reference to it
+  // directly.
+  int routing_id_;
+
+  // The run location at which injection is happening.
+  UserScript::RunLocation run_location_;
+
+  // The url of the frame, preserved for the same reason as the routing id.
+  GURL frame_url_;
+
   DISALLOW_COPY_AND_ASSIGN(ScriptsRunInfo);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_SCRIPTS_RUN_INFO_H_